Question about Fiat 124

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No spark between the distributor and coil

I have a 1973 Fiat 500L. There appears to be no spark between the distributor and coil. When I disconnected the coil wire from the distributor cap holding the end of the coil wire near a ground and had another person try to start there was no pulsing spark (I've done this with my other old cars to troubleshoot). Points are opening and the rotor is turning. Also can't figure out if it's an alternator or generator. Really could use a good mechanic here is Connecticut that knows these cars. Thanks so much!

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  • Master
  • 4,088 Answers

You need a voltmeter or test light to find 12 volts on one side terminal of the coil--the other side terminal goes to the distributor. If both sides have 12 volts, then the points may be dirty. If no 12 volts on the coil, trace that wire back to a resistor block on the firewall--check both ends for 12 volts. If still no 12 volts, check the ignition switch. Have you checked for a blown fuse?
Generators are usually nearly totally enclosed and long with several terminals sticking out. Alternators are shorter and wider with lots of ventilation slots and several terminals on the back. They also have a prominent fan behind a smaller pulley. You might see if you can find a Haynes service manual for this car if you are on your own.

Posted on Jul 19, 2009

  • timgable
    timgable Apr 16, 2014

    Same problem happend to me on my 82 Spider. Turned out that the wire that goes on the + Side of the coil is a shielded wire! i.e. It has an inner wire, and a bare wire wrapped around it, then another layer of insulation. The shielding wire or wire that wraps around the hot wire goes to ground. When I striped this wire to put a new terminal on it, I did not notice it, and in just stripped and crimped the new terminal on. What I actually did was join the ground to the + with the crimp. This caused there to be no spark leaving the coil. To fix, I cut the terminal off, peeled back the outer insulation, separated the shielding from the + wire! and put a new terminal on just the hoe wire. Started right up. Hope this helps!

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Posted on Jan 02, 2017

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2 Answers

My 1992 fiat uno pacer -1400 carbarator looses sparks from coil it come and goes after some time it comes back plz help me thanx z


replace the coil or coil packs
if no better plugs and leads and distributor cap if it has one

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Jul 08, 2016 | Fiat Cars & Trucks

1 Answer

Distributor troubleshooting


Your distributor may be installed backwards, or maybe just out of phase.
If backwards, you will probably never get it to start and, of course the solution is relatively simple.
If out of phase, the spark may be jumping to a different terminal inside the distributor cap and completely disrupting your ignition timing. See the attached video for an explanation of phasing and how to correct it on your car. (you will need an old distributor cap to drill a hole into so you can confirm spark)
It also occurs to me that the coil you have may not be compatible with your system.

Jul 07, 2014 | 1973 Triumph Stag

1 Answer

How to replace a distributor


disconnect the cable from the negative battry terminal. position the engine with number one cylinder at TDC on the compression stroke this mean you can take number one spark plug out with the engine cool place your thumb over the spark hole and have some one turn the engine over and and feel the presure by your thumb when you feel pressure stop turning engine take the distributor cap and make sure the rotor is pointing to number one spark wire in distributor cap if not you may have to turn the engine a little with your hand apply a paint mark on the edge of the distributor body directly below the rotor tip. also make a mark on the distributor base to the engine to ensure the distributor can be re-installed in exactly the same position as originally installed disconnected the coil wires from the distributor cap electrical connector, spark plug wires from the spark plugs remove the distributor hold-down bolt and pull out the distributor.

Jun 04, 2014 | 1995 Land Rover Discovery

1 Answer

Red max eb7001 has new coil,gapped right still no spark. im going crazy


1) The primary circuit: is battery, cap, resistor, capacitor,switch ignition+secondary circuit spark plug, distributor, high tension wires+spark plug.
the mayor problem arise in the coil and distributor, And the most common problem INCORRECT Choice de spark plugs or improperly gapped.
Rememeber the coil send 20,000-30,000 Vdc for spark plug.
Test with a screwdriver , pull out the center wire from the distributor cap and hold 3/8inch from a good ground. Crack the engine, if there no spark, or the spark is weak, the coil is defective or the high tension wires.
2) Bypass by a moment the baas resistor with a jumper wire while cranking engine If the engine starts, replace the ballast resistor.

God bless you.

May 12, 2012 | Cars & Trucks

3 Answers

I have a 1993 chev pick-up v6 4.3, i just installed new spark plugs,new plug wires, distributor cap and rotor button.All plug wires are back in the right position,and i used the firing order 1-6-5-4-3-2...


This diagram is for 1998-1995 Chevy 6 cylinder 4.3L engines.
Your got the firing order exactly correct, at 1-6-5-4-3-2, but here's the thing to double-check:
The distributor rotation is clockwise (note badly rendered arrow in picture).



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Since you probably got everything right, then you're left with really unusual/rare causes of
failure of the ignition system:
(a) rotor button misaligned/failing to make contact?
(b) rotor button not pressed onto distributor shaft far enough therefore failing to provide correct
proximity to distributor cap contacts when coil fires
(c) coil wire or contact loose/disconnected - press coil wire firmly down into distributor cap.
(d) distributor shaft of other damage caused during installation of rotor.
(e) spark plug wires defective from factory
(f) spark plugs defective from factory
(g) battery low - may need a charge to start
(h) ICM (ignition control module) failure - hook up your HEI (high energy ignition) tester, and
watch the quality of the spark on each cylinder.
(i) fuel problem? If spark is being properly delivered, its gotta be a fuel problem...
(j) distributor cap not screwed down flush to top of distributor? maybe just on one side?

Inspect the inside of the distributor cap - if there are lots of little metal bits all over the inside
of the distributor cap, then you know you have a misalignment of some type in there, and the
rotor and cap are destroying each other. normal operation will throw a quota of spark-ed off
metal bits inside the distributor cap, but since your cap is brand new, your attempts to start
the engine should have rotated the distributor so few times, you should see no metal debris.

Inspect the distributor cap contacts to see if any spark marks are more of less in the middle
of the cap's proper "contact zone". If not, you've diagnosed an internal misalignment, which
you know how to correct.

Sep 14, 2011 | Chevrolet 1500 Cars & Trucks

2 Answers

1981 Fiat 124 Spider. No spark coming from coil.


Assuming that you have a fully charged battery then you should check/replace the ignition points and condenser. This should ideally have been checked before investing in a new coil.

If in any doubt then just replace them as it's cheap and easy. Note that most Fiat 124 Spiders are a little more complicated than normal cars as they're often fitted with two sets of points instead of the usual single set. One set is used purely for starting and the engine switches over to the other set once it's running at full oil pressure.

Assuming you have a 1600cc dual point 124 Spider then look at the following web address to see how to replace and adjust your points:-
http://www.mirafiori.com/~thad/points.html

Note that although the points can be set roughly using a feeler gauge it's vital to adjust them correctly using a dwell meter.

The next web address gives you the specs for the US specification Fiat 124 Spider which usually had a single points distributor (points specs on page 21):-
http://homepage.mac.com/tmckaskle/fiat/images/specs/index.html#page1

When doing this job also check and replace both the distributor cap and rotor arm if they show signs of damage, burning or excessive wear.

This is not a difficult job, but it is fiddly. I usually found it easiest to remove the distributor from the engine to work on it but that does mean that you need to mark the position of the rotor arm as the distributor is withdrawn to ensure that you don't completely lose the ignition timing when you've finished. You'll need to recheck and adjust the timing afterwards whether the distributor is removed or not anyway.

Finally, for lots of detailed help and assistance, I strongly suggest that you register on the Fiat Forum at the address below:-

http://www.fiatforum.com/


Sep 17, 2009 | Fiat 124 Cars & Trucks

2 Answers

I have an 89 k3500 454 tbi not getting fire to plugs. have fire to and from coil, aldo has new coil ignition module ingnition switch distributor cap rotor button distibutor and starter. but no fire to...


Check the resistance of the pick-up coil in the distributor. Reading should be between 800 to 1200 ohms. Disconnect the two wire connection at the distributor control module to measure the resistance.
Let me know.
Regards,

Mar 25, 2009 | 1989 Chevrolet K3500

2 Answers

JEEP GRAND CHEROKEE NO SPARK


i just had the same problem. took it to jeep dealer. it was the ignition crank sensor. and wire. cost me $600.00. pepboys said it was the computer so i went and bought another one put it in, and went to the dealer to flash it. that wasn't it. go to the dealer, or pay $1200.00 like i did. good luck!

Feb 02, 2009 | 1998 Jeep Grand Cherokee

1 Answer

My 2002 dodge ram van cranks/ won't fire


The coil is inside the distributor cap. It is a flat round plastic plate the cap pushes downn on when you put it on, with wires going to it. Disconnect the wire connector, remove the distributor cap, remove the rotor, pull up on the wires till the coil/plate pops off the distributor housing. Replace with new coil, reverse procedure to assemble it all.
Be careful to clean inside the distributor when you have the coil out, as it does not come apart often, and sand and dirt builds up under the shield/plate of the coil, especially in dusty areas, so blow it and wipe it out good. Put the new coil in. Put the rotor on, then the cap.
Replace all this stuff if you have trouble with the coil.
Also, replace spark plugs or clean them, as misfires and mis timed spark can cause one or more plugs to really carbon up fast and bad.

Dec 26, 2008 | 1998 Dodge Ram

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